<script>
window.onload = function() {
  // 添加自定义按钮
  const topbarElement = document.getElementsByClassName('topbar')[0];
  const authButton = document.createElement('button');
  authButton.innerHTML = 'Token';
  authButton.onclick = function() {
    // 处理授权逻辑
  };
  topbarElement.appendChild(authButton);
};
</script>